Update README.md
bugfix: Iterating a Row stopped when content was NULL
Merge pull request #69 from CXO/BugfixContentNull

bugfix: Iterating a Row stopped when content was NULL
Refactorisation
Implement sleep method for the property container class
Merge pull request #75 from rado-h/upstream

Unnecessary caching of client object when an entity is cached
Merge branch 'master' into xavismeh-master
Fix indentation
Merge pull request #73 from xavismeh/master

Refactorisation
Merge branch 'master' into xavismeh-master
Merge remote branch 'upstream/master'